<template>
  <table>
    <tr v-if="treeData.name">
      <td
        :colspan="Array.isArray(treeData.children) ? treeData.children.length * 2 : 1"
        :class="{ parentLevel: Array.isArray(treeData.children) && treeData.children.length, extend: Array.isArray(treeData.children) && treeData.children.length && treeData.extend }"
      >
        <div :class="{ node: true, hasMate: treeData.mate }">
          <div
            class="person"
            :class="(highlight && highlight.indexOf(treeData.id) >= 0) ? ['highlight'] : []"
            @click="$emit('click-node', treeData)"
          >
            <div class="avat">
              <img src="http://qkl-hy.oss-cn-chengdu.aliyuncs.com/2022/12/18/5f7f704049ab4e19b1dce6b7c291c494.jpg">
            </div>
            <el-tag color="rgb(160, 207, 255)">
              {{ treeData.name }}
            </el-tag>
          </div>
          <template v-if="treeData.mate">
            <div
              :key="treeData.mate.id"
              class="person"
              :class="(highlight && highlight.indexOf(treeData.mate.id) >= 0) ? ['highlight'] : []"
              @click="$emit('click-node', treeData.mate)"
            >
              <div class="avat">
                <img src="http://qkl-hy.oss-cn-chengdu.aliyuncs.com/2022/12/18/5f7f704049ab4e19b1dce6b7c291c494.jpg">
              </div>
              <el-tag color="rgb(225, 243, 216)">
                {{ treeData.mate.name }}
              </el-tag>
            </div>
          </template>
        </div>
        <div
          v-if="Array.isArray(treeData.children) && treeData.children.length"
          class="extend_handle"
          @click="toggleExtend(treeData)"
        />
      </td>
    </tr>
    <tr v-if="Array.isArray(treeData.children) && treeData.children.length && treeData.extend">
      <td v-for="(children, index) in treeData.children" :key="index" colspan="2" class="childLevel">
        <TreeChart :json="children" :highlight="highlight" @click-node="$emit('click-node', $event)" />
      </td>
    </tr>
  </table>
</template>

<script>
export default {
  name: 'TreeChart',
  props: ['json', 'highlight'],
  data() {
    return {
      treeData: {}
    }
  },
  watch: {
    json: {
      handler: function(Props) {
        const extendKey = function(jsonData) {
          jsonData.extend = (jsonData.extend === void 0 ? true : !!jsonData.extend)
          if (Array.isArray(jsonData.children)) {
            jsonData.children.forEach(c => {
              extendKey(c)
            })
          }
          return jsonData
        }
        if (Props) {
          this.treeData = extendKey(Props)
        }
      },
      immediate: true
    }
  },
  methods: {
    toggleExtend: function(treeData) {
      treeData.extend = !treeData.extend
      this.$forceUpdate()
    }
  }
}
</script>

<style scoped>
table {
    border-collapse: separate !important;
    border-spacing: 0 !important;
}

td {
    position: relative;
    vertical-align: top;
    padding: 0 0 50px 0;
    text-align: center;
}

.extend_handle {
    position: absolute;
    left: 50%;
    bottom: 30px;
    width: 10px;
    height: 10px;
    padding: 10px;
    transform: translate3d(-15px, 0, 0);
    cursor: pointer;
}

.extend_handle:before {
    content: "";
    display: block;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
    border: 2px solid;
    border-color: #ccc #ccc transparent transparent;
    transform: rotateZ(135deg);
    transform-origin: 50% 50% 0;
    transition: transform ease 300ms;
}

.extend_handle:hover:before {
    border-color: #333 #333 transparent transparent;
}

.extend .extend_handle:before {
    transform: rotateZ(-45deg);
}

.extend::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 15px;
    height: 15px;
    border-left: 2px solid #ccc;
    transform: translate3d(-1px, 0, 0)
}

.childLevel::before {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 100%;
    height: 15px;
    border-left: 2px solid #ccc;
    transform: translate3d(-1px, 0, 0)
}

.childLevel::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: -15px;
    border-top: 2px solid #ccc;
}

.childLevel:first-child:before,
.childLevel:last-child:before {
    display: none;
}

.childLevel:first-child:after {
    left: 50%;
    height: 15px;
    border: 2px solid;
    border-color: #ccc transparent transparent #ccc;
    border-radius: 6px 0 0 0;
    transform: translate3d(1px, 0, 0)
}

.childLevel:last-child:after {
    right: 50%;
    height: 15px;
    border: 2px solid;
    border-color: #ccc #ccc transparent transparent;
    border-radius: 0 6px 0 0;
    transform: translate3d(-1px, 0, 0)
}

.childLevel:first-child.childLevel:last-child::after {
    left: auto;
    border-radius: 0;
    border-color: transparent #ccc transparent transparent;
    transform: translate3d(1px, 0, 0)
}

.node {
    position: relative;
    display: inline-block;
    margin: 0 1em;
    box-sizing: border-box;
    text-align: center;
}

.node .person {
    position: relative;
    display: inline-block;
    z-index: 2;
    width: 6em;
    overflow: hidden;
}

.node .person .avat {
    display: block;
    width: 4em;
    height: 4em;
    margin: auto;
    overflow: hidden;
    background: #fff;
    border: 1px solid #ccc;
    box-sizing: border-box;
}

.node .person .avat img {
    width: 100%;
    height: 100%;
}

.node .person .name {
    height: 2em;
    line-height: 2em;
    overflow: hidden;
    width: 100%;
}

.node.hasMate::after {
    content: "";
    position: absolute;
    left: 2em;
    right: 2em;
    top: 2em;
    border-top: 2px solid #ccc;
    z-index: 1;
}

/* 横板 */
.landscape {
    transform: translate(-100%, 0) rotate(-90deg);
    transform-origin: 100% 0;
}

.landscape .node {
    text-align: left;
    height: 8em;
    width: 8em;
}

.landscape .person {
    position: relative;
    transform: rotate(90deg);
    padding-left: 4.5em;
    height: 4em;
    top: 4em;
    left: -1em;
}

.landscape .person .avat {
    position: absolute;
    left: 0;
}

.landscape .person .name {
    height: 4em;
    line-height: 4em;
}

.landscape .hasMate {
    position: relative;
}

.landscape .hasMate .person {
    position: absolute;
}

.landscape .hasMate .person:first-child {
    left: auto;
    right: -4em;
}

.landscape .hasMate .person:last-child {
    left: -4em;
    margin-left: 0;
}

.highlight {
    box-shadow: 0 2px 4px rgba(0, 0, 0, .12), 0 0 6px #F56C6C
}
</style>
